method
GetBottomPointsPosition
System.Web.UI.DataVisualization.Charting.ChartTypes.AreaChart.GetBottomPointsPosition(System.Web.UI.DataVisualization.Charting.CommonElements, System.Web.UI.DataVisualization.Charting.ChartArea, System.Single, ref System.Web.UI.DataVisualization.Charting.DataPoint3D, ref System.Web.UI.DataVisualization.Charting.DataPoint3D, System.Drawing.PointF, System.Drawing.PointF, out System.Drawing.PointF, out System.Drawing.PointF)